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	Term	术语	Definition	定义
	bifurcation	分汊，分流，分支	A division into two branches.	指河道分为两支。
	bifurcation buoy	分叉浮标，航道左右通航标	See BUOY: BIFURCATION.	一种特殊的侧面标，用来表示航道分叉或推荐航道的起点。
	bight	海湾；冰绝湾	A bend or curve in the COASTLINE, a bend in a RIVER, etc. In ice terminology, an extensive crescent-shaped indentation in the ICE EDGE forme... more A bend or curve in the COASTLINE, a bend in a RIVER, etc. In ice terminology, an extensive crescent-shaped indentation in the ICE EDGE formed either by WIND or CURRENT.	海岸线的弯曲或弯入部分，以及河流等的弯曲处。在冰的术语中，指冰的边缘因风或流的作用形成的月牙... more 海岸线的弯曲或弯入部分，以及河流等的弯曲处。在冰的术语中，指冰的边缘因风或流的作用形成的月牙形凹进。
	Bilby steel tower	毕氏钢架[标]	A demountable and transportable TRIANGULATION TOWER for elevating a THEODOLITE and LUMINOUS SIGNALS above the GROUND, designed by J.S. Bilby... more A demountable and transportable TRIANGULATION TOWER for elevating a THEODOLITE and LUMINOUS SIGNALS above the GROUND, designed by J.S. Bilby, USC&GS.	一种在地面上用来抬高经纬仪和发光信号的可拆卸迁移的三角架，它由美国海岸大地测量局毕尔贝（J.S. Bil... more 一种在地面上用来抬高经纬仪和发光信号的可拆卸迁移的三角架，它由美国海岸大地测量局毕尔贝（J.S. Bilby）设计的。
	billow	巨浪	A great WAVE.	巨大的海浪。
	binary	二进制，二元	The number system using 2 as the base for number representation. Binary numbers are composed of BITS. Generally any element capable of only ... more The number system using 2 as the base for number representation. Binary numbers are composed of BITS. Generally any element capable of only two mutually exclusive states is called binary.	用2作为数字表示基础的数字系统。二进制数是由二进制数位构成的。一般来说，任何只有两个互不相容状�... more 用2作为数字表示基础的数字系统。二进制数是由二进制数位构成的。一般来说，任何只有两个互不相容状态的元素都可称作二进制。
	binnacle	罗经柜，罗经座	The stand in which a COMPASS is mounted and in which lighting and compensatory units are carried.	安装罗经的底座，上面带有照明和补偿装置。
	binocular(s)	双筒望远镜	An optical instrument consisting of a pair of TELESCOPES joined so as to be adaptable to the use of both eyes simultaneously.	由一对望远镜连接组成的光学仪器，可同时用双眼进行观察。
	binocular vision	双目视觉	Simultaneous vision with both eyes.	通过双眼同时观察。
	biology: marine	海洋生物学	The study of the life, history and ECOLOGY of marine and brackish water plants and animals.	研究海洋及咸水中动、植物的生命、历史和生态的学科。
	bioluminescence	生物发光	The emission of light by living organisms. See also NOCTILUCA.	由生物活体发出的光。亦可参见noctiluca（夜光虫）。
	biosphere	生物圈	Spherical terrestrial LAYER comprising the lower part of the ATMOSPHERE, the SEAS and the upper LAYERS of the SOIL within which living organ... more Spherical terrestrial LAYER comprising the lower part of the ATMOSPHERE, the SEAS and the upper LAYERS of the SOIL within which living organisms can exist naturally.	指地球大气层的下部、海洋以及土壤的上层所组成的一个球形层。在这个范围内生物可自然生存。
	bissextile year	闰年	See YEAR: CIVIL.	参见civil year(民用年)。
	bit	位，比特	Short for "binary digit", the digit in binary number representation. A bit can only assume the binary values "0" and "1". A binary number re... more Short for "binary digit", the digit in binary number representation. A bit can only assume the binary values "0" and "1". A binary number representation is composed of bits just as a decimal number is represented by decimal digits. A unit of 8 bits is called a BYTE. It also stands for "basic indissoluble information unit", a unit used for measuring the information content in information theory.	二进制位的简写，用“0”和“1”表示二进制数中的数字。类似十进制数采用十进制位表示。8个二进制位�... more 二进制位的简写，用“0”和“1”表示二进制数中的数字。类似十进制数采用十进制位表示。8个二进制位组成一个字节，它是信息理论中用于计算信息量的不可再分的基本单位。
	blind rollers	长涌，滚涌	Long, high SWELLS which have increased in HEIGHT, almost to the breaking point, as they pass over SHOALS or run in shoaling water. Called bl... more Long, high SWELLS which have increased in HEIGHT, almost to the breaking point, as they pass over SHOALS or run in shoaling water. Called blind seas in some localities.	参见blind seas(长涌)。
	blind seas	（不起浪花是）长涌，涌浪	See BLIND ROLLERS.	一种又长又高的涌浪（Swell），这种涌经过浅滩或浅水区时，高度增加接近碎浪点。有些地方称之为长涌（... more 一种又长又高的涌浪（Swell），这种涌经过浅滩或浅水区时，高度增加接近碎浪点。有些地方称之为长涌（blind seas）。
	blind zone	盲区，无信号区	An area within or from which little or no radio SIGNAL is received. Also called zone of silence.	无法收到无线电信号或收到信号非常微弱的区域。亦可称之为zone of silence（盲区）。
	blip	脉冲，尖头信号	Indication of a SIGNAL on the SCOPE of an electronic instrument, produced by a short sharply-peaked PULSE of voltage.	电子仪器显示器上的信号指示，由电压的短峰脉冲形成。
	blizzard	暴风雪	Violent and very cold WIND which is laden with SNOW, some part, at least, of which has been raised from snow-covered GROUND. This term origi... more Violent and very cold WIND which is laden with SNOW, some part, at least, of which has been raised from snow-covered GROUND. This term originated in North America but has been extended to include similar WINDS in other countries.	指猛烈的寒风夹着大雪，其中部分雪卷起于地面。这个术语起源于北美，后来扩展到其它国家类似的气象�... more 指猛烈的寒风夹着大雪，其中部分雪卷起于地面。这个术语起源于北美，后来扩展到其它国家类似的气象。
	block correction	贴图改正	See CHARTLET.	参见chartlet（海图小改正）。
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